I'm surprised more museums don't have modern replicas demonstrating what the ancient artifacts would have looked like when pristine.
https://www.japanpowered.com/folklore-and-urban-legends/mirr...
Technology tends to influence cultures in subtle ways few remember a generation later. =3
https://en.wikipedia.org/wiki/The_Most_Dangerous_Animal_In_T...
Restoring them would also cause repeated wear and tear, and potentially erasing clues we haven't recognised as important yet.
Making replicas is more suitable: the public can also touch and use them as well.
Do we?
[1] https://www.worldhistory.org/image/2232/fresco-of-a-statue-o...
But the paintings which have been preserved from antiquity are quite beautiful.